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Data Communications and Computer Networks: A Business User's by Curt White PDF

By Curt White

ISBN-10: 1133626467

ISBN-13: 9781133626466

Information communications and desktop networks are very important in today's company international. even if your occupation involves enterprise administration, computing device programming, method layout, or a comparable quarter, DATABASE COMMUNICATIONS AND computing device NETWORKS, seventh variation provide you with the thorough figuring out you wish of easy positive factors, operations, and barriers of alternative forms of desktop networks. The 7th version keeps some of the parts that made earlier variations so well known, together with clarity, insurance of the most up-tp-date applied sciences, and a balanced presentation of either technical and sensible daily features of information communications. This e-book deals complete insurance of instant applied sciences, convergence, compression strategies, community safeguard, LAN applied sciences, VoIP, and mistake detection and correction.

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Extra info for Data Communications and Computer Networks: A Business User's Approach (7th Edition)

Sample text

Your company is connected to the Internet and has both local area networks and a mainframe computer. List all the different network layouts involved in this operation. You are sitting at the local coffee shop, enjoying your favorite latte. You pull out your laptop and, using the wireless network available at the coffee shop, access your e-mail. List all the different network layouts involved in this operation. With your new cell phone, you have just taken a snapshot of your best friend. You decide to send this snapshot to the e-mail account of a mutual friend across the country.

Even then, different sources use different names for each of the layers. For this book, we will define five layers, as shown in Figure 1-12: application, transport, network, network access, and physical. Note that the layers do not specify precise protocols or exact services. In other words, the TCP/IP protocol suite does not tell us, for example, what kind of wire or what kind of connector to use to connect the pieces of a network. That choice is left to the designer or implementer of the system.

Figure 1-16 Sender and receiver communicating using the TCP/IP protocol suite Application Logical Connections Application Transport Transport Network Network Network Access Network Access Physical Sender Physical Physical Connection Receiver Notice the dashed lines between the sender’s and receiver’s application layers, transport layers, network layers, and network access layers. No data flows over these dashed lines. Each dashed line indicates a logical connection. A logical connection is a nonphysical connection between sender and receiver that allows an exchange of commands and responses.

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Data Communications and Computer Networks: A Business User's Approach (7th Edition) by Curt White


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